Research Article
Procedure to Use PZT Sensors in Vibration and Load Measurements
Table 4
(a) Correlation factors (CF) for healthy beam. (b) Correlation factors (CF) for unhealthy beam.
(a) |
| Frequency (Hz) | Accelerometer response (g) | Measured strain (µε) | PZT response (V) | Acceleration CF (g/V) | Strain CF (µε/V) |
| 27.5 | 0.0069 | 1.1 | 1.027 | 0.0067 | 1.07 | 28.0 | 0.0117 | 2.1 | 1.836 | 0.0064 | 1.14 | 28.5 | 0.0428 | 7.4 | 5.930 | 0.0072 | 1.25 | 29.0 | 0.0176 | 3.1 | 2.900 | 0.0061 | 1.07 |
| Average | 0.0066 | 1.132 |
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(b) |
| Frequency (Hz) | Accelerometer response (g) | Measured strain (µε) | PZT response (V) | Acceleration CF (g/V) | Strain CF (µε/V) |
| 27.5 | 0.031 | 4.7 | 2.61 | 0.0119 | 1.80 | 28.0 | 0.037 | 5.9 | 3.29 | 0.0112 | 1.79 | 28.5 | 0.028 | 4.6 | 2.70 | 0.0104 | 1.70 | 29.0 | 0.018 | 3.2 | 1.97 | 0.0093 | 1.62 |
| Average | 0.0107 | 1.72 |
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